Urine THC testing will return a positive result if the donor has used THC sometime recently, but not necessarily that they’re inebriated right now, whereas BAC tests can determine if someone is intoxicated at the time of the test. Is there a reason we don’t have “you are high right now” tests instead of “you smoked 2 weeks ago” tests?
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Most tests don’t test for THC but metabolites. So a chemical that is created after getting high and has metabolized in your body. And it stays in your fatty tissues.
I will add, if you could take that metabolite they test for and smoke it, it wouldn’t get you high.
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